Motor-gearing for revolving doors.



E. c. HAVILAND.

MOTOR GEABING FOR REVOLVING DOORS. APPLIOATION-HLED 11.13.14, 1911.

Patented Jan.23,1912.

3 SHEETS-SHEET 1.

E. 0. HAVILAND. MOTOR GBARING FOR REVOLVING DOORS.

APPLIOATION FILED MAILM, 1911.

Patented Jan. 23, 1912.

3 SHBBTSSHEET 2.

B..G. HAVILAND. MOTOR GBARING FOR RE OLVING DOORS.

APPLICATION FILED MAR-14,1911.

Patented Jan. 23, 1912.

3 SHEETS-SHEET 3.

COLUMIIA PLANDGRAPM couwAsrnNu'ioN. D. c.

EDWARD c. HAVILAND, OF NEW YORK, 13003 COMPANY, on NEW YORK,

N. Y., ASSIGNOR T0 V AN'KANNEL REVOLVING N. Y., A CORPORATION OF NEWJERSEY.

MOTOR-GEARING FOR REVOLVING DOORS.

Specification of Letters Patent.

Patented Jan. 23, 1912.

Application filed March 14, 1911. serial No. 614,351.

To all whom it may concern:

Be it known that I, EDWARD C. HAVILAND, a citizen of the United States,residing at 290 East One Hundred and Thirty-fourth street, New York,county of New York, and State of New York, have invented certain new anduseful Improvements in Motor- Gearing for Revolving Doors, fully described and represented in the following specification and theaccompanying drawings, forming a part of the same.

The invention relates to revolving doors having wings rotated within asegmental casing, and the object of the invention is to facilitate theturning of the door by the passenger in his transit through the same. Toconform to architectural surroundings, it has become common to make thewings of such revolving doors of bronze and other ornamental material ofconsiderable weight, so that the inertia of the door opposes a greatresistance to the passenger when pressing upon one of the wings to makehis transit through the door-casing. If such a heavy door were revolvedcontinuously by a motor at a suitable speed for the transit ofpassengers, it would embarrass and sometimes injure those unaccustomedto the use of such doors; and to avoid such accidents it is preferablethat the door should rotate at only a very slow speed until the wingsare pressed upon by the passenger, and mechanism then operateautomatically to rotate the door at a suitable higher speed for thepassenger to move quickly through the same. The high speed of the doorwings should then be automatically arrested, so that the space betweenthe wings may be safely entered by other passengers, who in turn wouldengage the mechanism for producing the higher speed during their owntransit through the door-casing.

To meet these conditions, the invention furnishes mechanism for rotatingthe doors and means actuated by the passenger when moving through thedoorway for engaging such mechanism and increasing the speed of the doorwings; the mechanism preferably operating to rotate the door slowly whenpassengers are not moving through it, so that the inertia of the doormay not oppose the desired higher speed.

The invention will be understood by reference to the annexed drawing, inwhich- Figure 1 is an elevation of a revolving door with a part of themotor-gearing in section, on the center line ofthe upright spindle; Fig.2 is an elevation of the motorgearing and the connections from the sameto the spindle of the revolving door; Fig. 3 is a plan showing thefriction-gearing in operation; Fig. 4 is an end view of the doormovingor clutch-pulley and thrust-thumb; and Fig. 5 is a plan of themotor-gearing and the connections to the revolving door, the parts beingshown in section at the center of the driving-shaft and back gear-shaft.

A designates the door-casing, B the spindle carrying the wings C andshown connected by a coupling-socket D to an uprightshaft E in anapartment F below the door. Bevel-gears G, G, connect the upright'shaftF with a so-called intermediate shaft H having connected pulleys I and Jfitted to turn loosely thereon, and a pulley K fixed thereto to rotatesaid shaft and the door. The pulley I is driven by belt I from a motorL, and the pulley K and intermediate shaft are driven by belt K,,, froma door-moving pulley M upon a driving-shaft N. Such door-moving pulleyoperates, also, as a clutch-pulley, 'and is rotated continuously withthe driving-shaft; which turns at different rates of speed according tothe gearing engaged therewith.

The clutch-pulley is capable of turning slightly upon the shaft, andadvancing endwise during its rotations with the shaft, so as to clampthe side of an annular frictiongear W, by means of a friction-plate M. Apulley J from the belt J rotates a driving-pulley 0 upon thedriving-shaft N at a uniform so-called high speed; but such pulley isnot attached to the shaft and operates, unless the clutch-pulley beactuated, to turn the shaft slowly by means of gearing upon a backgear-shaft P. A pinion Q upon the driving-pulley O meshes with agear Rfitted to turn loosely upon the back gear-shaft and operating normallyto turn the same by a pawl S engaging a ratchet T which is attached tosuch shaft. A pinion U fixed to the back gear-shaft engages a wheel Vfixed to the driving-shaft .N, and the back gear thus operates normallyto transmit a so-called slow-speed to the driving-shaft and through thepulley M to the intermediate shaft and the door. An annularfriction-gear W, consisting of a composite ring of leather mounted upona spider, is fitted to turn loosely upon the driving-shaft between theflange M of the clutch-pulley M and the driving-pulley O, and clearsboth so slightly that any motion of the clutch-pulley M toward thedrivingpulley operates to clamp the friction-gear and cause theclutch-pulley to rotate at the same speed as the driving-pulley, andthus results in driving the pulley K and the door at the so-calledhigh-speed. A thrust-hub X is secured to the driving-shaft- N adjacentto the clutch-pulley MI, and an inclined link Y is pivoted at oppositeends to such thrust-hub and to the hub of the clutch-pulley.

Arrows indicate the direction of rotation, which is the same whether thedoor he running at slow-speed or high-speed and is adapted to straightenthe link Y if the clutch-pulley be turned upon the shaft while inmotion. As any pressure upon the door wings to turn the same is in thedirection of their rotation, it operates when the door is turning at aslow speed to turn the pulley M a little faster than the driving-shaft Nis turned by the back gearing, and such rotation of the clutch-pulleyturns its hub in relation to the thrust-hub X and operates to turn thelink Y more nearly into the line of the driving-shaft. The link thusacts as a toggle with considerable force, and oper-- ates to press theclutch-pulley forcibly toward the annular friction-gear TV, crowding thesame against the driving-pulley O which is rotated by its motorconnection at a uniform so-called high-speed, (as shown in Fig. 3) andcauses the clutch-pulley and also the driving-shaft to rotate at thesame speed. The door is thus, while the'pressure upon the door wingcontinues, rotated at the so-called high-speed by the belt K andintermediate shaft. When the pressure upon the door-wing ceases thedriving force of the shaft N exerted through the hub X tends to turn thelink back to its initial position shown in Fig. 5, and the clutch-pulleyis then detached from the friction-gear V by a fly-wheel Z fitted toturn upon the shaft N and connected with a fixed hub by a spirallycoiled spring Z which drives the wheel when the shaft is uniformlyrotated; but permits it to turn thereon when the speed of the shaft isvaried or reduced. When the fly-wheel thus turns, a pin m upon its hubcontacts with a pin 01, upon a collar 0, fixed on the shaft N, givingthe shaft a jerk in the direction of its rotation, which turns the hub Xand straightens or loosens the link y. Such effect is produced, becausethe rotation of the shaft N is tending constantly to turn the hub X inrelation to the pulley M so as to move the link X back to its initialposition, shown in Fig. 5, and such tendency is only overcome by thepressure of the hand upon the door-wing which changes the operation ofthe intermediate shaft H, from a shaft driven by the pulley 0 throughthe back-gear into a shaft which under the hand impulse turns the pulleyY in relation to the hub X to straighten the link. Such turning of thepulley M by hand operates to straighten the link, and while this causesthe shaft N to revolve faster it cannot immediately affect the speed ofthe fiy-wheel, as the fly-wheel is loose on the shaft N, and the effectof the shafts increased speed is first to coil the spring within the hubof the fly-wheel. As the movement of any passenger through the revolvingdoor is very brief, the pressure of the hand upon the door-wing isequally brief, and ceases before the fly-wheel attains the velocity ofthe shaft N. \Vhen the pressure upon the doorwing ceases, the spring isimparting its energy to the flywheel, which causes the liy-whecl soon torevolve as fast as, or faster, than the shaft, thus jerking the linkinto an inclined posi tion, which loosens the grip of the pulley M uponthe pulley O. The shaft then immediately assumes its slow speed, whichit retains until the door-wing is again pushed by hand.-

hen the driving-shaft is rotated through the back-gearing at slow speed,the thrust-hub X operates positively to turn the clutch-pulley and thedoor, by means of shoulders a formed upon the thrust-hub and the hub ofthe clutch-pulley, which operate as clutch-teeth to turn theclutch-pulley positively at the slow-speed; but which become separatedautomatically when the clutch-pulley is turned by sufficient pressureupon the door wings to move the link Y, as shown in Fig. 8. hen thedriving-shaft is driven by the friction-gear at an increased rate ofspeed, the gear V operates instead of the gear Q. to drive the backgear-shaft, the teeth of the ratchet-wheel T slipping beneath the pawlS; as the loose wheel R is turning at a slower rate of speed than theratchetwheel T.

It is often desirable to collapse the wings of a revolving-door and.shift them sidewise in the casing to make a clear passage in the casingin warm weather, and I provide means for disconnecting the upright shaftF from the door to permit such a shifting of the wings. This is effectedby forming a coupling-socket D upon the bottom of the door-spindle atthe level of the floor D and making the upright shaft E to slidevertically to connectand disconnect with such socket. The socket, asshown in Fig. 2, is formed with a tapering square recess and the top ofthe shaft E is correspondingly tapered to fit such recess, and its upperend is guided in the floor by a hearing I). The bottom of the uprightshaft is supported in a step 0 movable vertically in a socket (Z fixedto the floor f of the .apartment F, and such step can be raised andlowered by a lever 6 having an adjustable wedge f resting upon a pin 9in a supporting guide It. The shaft is fitted movably to the bevel-gearG by a spline 2' and the bevel-gear is supported upon a fixed bearing9', so that the step 0 can be raised and lowered without disturbing therelation of the gears G, G. The removal of the pin 9 below the lever 6permits the shaft to be lowered sufficiently to disconnect its upper endfrom the coupling-socket D, and when engaged wit-h such socket the shaftis held at the right elevation by the supporting-pin g and by adjustingthe wedge f upon the lever e by means of bolts inserted through slots inthe wedge.

It is common to suspend the wings of a revolving door, by its spindle,from an overhead carriage by which the Wings may be shifted laterallywhen the wings are collapsed, and it will be readily understood thatsuch or any other suitable means may be used to shift the wings whendisconnected from the vertical shaft E.

It will be seen from the above description that the operation of thespeed-gearing is entirely automatic, as the door can be revolvedmechanically at a so-called slow-- speed and the speed then increased bythe mere instinctive action of the passenger in pressing upon the wingsto turn the door, the increased speed automatically stopping when thepassengers pressure upon the wings ceases.

It is obvious that the friction-gear W would operate to turn the pulley.M when pressure is exerted upon the wings, whether or not the wings bealready rotated at a slow speed, and I do not therefore limit myself tomeans for rotating the door at two dilferent speeds. It is also obviousthat other means than pressure upon the wings can be actuated by thepassenger whenv moving through the door-casing, to engage the mechanismfor revolving the door, and I have not, therefore, limited myself in myclaims to the particular mechanism herein described.

Having thus set forth the nature of the invention what is claimed hereinis:

1. In a revolving door having a central spindle with wings attached tobe pushed by the passenger, the combination, with such door, of a motorwith mechanism having a. elutch to rotate the door, and means connectedwith the door-spindle for throwing the clutch into operation when thedoorwings are pressed and the spindle turned at the will of thepassenger.

2. In a revolving door having wings, the combination, with such door, ofmechanism operated automatically to rotate the door slowly, andmechanism engaged by pressure increased rate of speed.

In a revolving door having wings to be pushed by the passenger, thecombination, with such door, of a motor with mechanism connected to thedoor for automatically rotating the door slowly, and additionalmechanism connecting the motor and the door and engagediby pressure uponthe wings for roating the door at an increased rate df speed.

4.111 a revolving door having wings to be pushed by the passenger, thecombination, with such door, of a motor, a. gear-shaft connected theretoand to the door for rotating the door slowly, gearing upon thegear-shaft for rotating the door more rapidly, and a clutch actuated bypressure upon the door wings for engaging such gearing with thegear-shaft.

5. In a revolving door having wings to be pushed by the passenger, thecombination, with such door, of a motor, a gearshaft connected theretoby back-gearing to drive the shaft slowly, such back-gearing having adetachable connection therein, high speed gearing upon the gear-shaftfor rotating the door more rapidly, and a clutch actuated by pressureupon the door wings for engaging such high speed gearing with thegear-shaft.

6. In a revolving door having wings to be pushed by the passenger, thecombination, with such door, of a motor, a gearshaft connected theretoby a driving-pulley adapted to turn loosely upon the gearshaft,back-gearing connecting the pulley with the gear-shaft to turn itslowly, a friction-wheel adjacent to the driving-pulley,

a clutch-plate rotated with the gear-shaft and connected to the door,and a clutch actuated by pressure upon the door wings for shifting theclutch-plate to engage the frictionwheel with the pulley andtransmitting the rapid motion of the pulley to the clutchplate,gear-shaft and door.

In a revolving door having a central spindle with wings to be pushed bythe passenger, the combination, with such spindle, of an intermediateshaft geared thereto, a driving gear-shaft connected with the intermediate shaft to drive the same, a driving-pulley upon saiddriving-shaft with gearing for rotating the shaft and door continuouslyat a so-called slow-speed, gearing normally disconnected with thedriving shaft to turn the same and the door at a so-called high-speed,and a clutch actuated by pressure upon the wings and the consequenttorsion of the door-spindle, to connect such high-speed gearing with thedriving-shaft and turn the door at such highspeed during the continuanceof the pressure upon the wings.

8. The mechanism for revolving a door having a spindle and wings,consisting of a driving-shaft N, a. cog-wheel V attached thereto, a backgearshaft P connected with the .gear V, a driving-pulley O fitted toturn loosely on the driving-shaft and connected by cog-wheels Q, and Rto the back gear-shaft to rotate the driving-shaft at a so-calledslow-speed, a combined clutchpulley having a clutch-plate arranged toturn against the driving-pulley O, and transmitting the socalledhigh-speed of the driving-pulley to the clutch-pulley and the door, theback-gearing having a slip connection with the driving-shaft, to permitthe rotation of the driving-shaft independently of the back-gear shaft.

9. The mechanism for revolving a door having spindle and wings,consisting of an intermediate shaft H geared to the doorspindle, largeand small loose pulleys rotatable on the intermediate shaft and drivenby motor connection, a driving-shaft N having clutch-pulley and beltconnection with the intermediate shaft, a driving-pulleyrotatedcontinuously by a belt from the small pulley upon the intermediateshaft, an

annular friction-gear loose upon the drivingshaft between theclutch-pulley and the driving-pulley, and means actuated by pressureupon the door wings for crowding the clutchpulley toward suchfriction-gear and driving-pulley, and transmitting the rapid motion ofthe driving-pulley to the drivingshaft and thereby to the door.

10. The combination, with a revolving door having casing with wingsrotated therein, of a door-spindle having a couplingsocket upon thelower end, an upright shaft movable through the floor into and out ofsuch coupling-socket, and motorgearing connected with such shaft forrotating the door, whereby the upright shaft may be disconnected fromthe door and the door wings shifted sidewise in the casing when desired.

11. The combination, with a revolving doorhaving a casing with wingsrotated therein, of a door-spindle having a coupling-socket upon thelower end, an upright shaft movable through the floor into and out ofsuch coupling-socket, a bevel-wheel splined upon such shaft, a motorwith gearing for rotating the bevel-wheel for turning the door, andmeans for raising and lowering the upright shaft through such bevelwheelfor coupling with the door-spindle.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

EDlVARD C. HAVILAND. \Vitnesses LENORA LEMON, BARRY E. MoGUs'rY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

